On 01/06/2023 16:27, Emanuele Rocca wrote: > Hi again, > > On 2023-05-31 05:46, Samuel Thibault wrote: >> The problem is that both are frown-prone. I guess there is a reason why >> on arm the default console is set to the serial port, e.g. for simpler >> debugging or something like that. > > Also worth mentioning: there is no bug on real hardware (eg: RPi 3B+). > > So far I think we've only heard about people getting this issue with > qemu.
I've had this problem on my chromebook (rk3399-gru-kevin) since forever. I don't know what's best here, but wanted to provide more context in case it helps. Thank you all for working on it. There's actually two different things that can make Linux set a serial port as the preferred console on arm64 systems: - An SPCR table on devices using ACPI - A /chosen stdout-path property on devices using device-tree I had once tried to change it on the kernel side, going through that email thread [1] might make the how-and-why clearer. (I've silently given up on that series) Furthermore, the same thing happens in the installed system as well, which will ask for your encryption password over a serial console that you have no access to [2] unless you have ended up installing plymouth transitively through a desktop environment. Adding console=tty0 would persist into the installed system and fix that, so I'm used to doing that as a workaround on my own systems. But that disables the serial console on device-tree systems, so doing it by default is a problem for SBCs etc. where people might genuinely be trying to install over serial. (I'd still like it for "Graphical Install" entries [3], but that's orthogonal to this). [1] Prefer working VT console over SPCR and device-tree stdout-path https://lore.kernel.org/lkml/20200513143755.GM17734@linux-b0ei/ [2] initramfs-tools: prefers serial console over framebuffer console https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=952452 [3] arm64 graphical installer fixes merge request https://salsa.debian.org/installer-team/debian-installer/-/merge_requests/17
